VISION ACADEMY CHEM 9

1. What happens in a decomposition reaction?

• COMPOUND DECOMPOSES TO GIVE TWO OR MORE ELEMENTS
• COMPOUND DECOMPOSES TO GIVE TWO OR MORE SIMPLER COMPOUNDS
• COMPOUND DECOMPOSES TO GIVE ONE ELEMENT & ONE COMPOUND
• ALL OF THE ABOVE

2. Which coloured gas is evolved when Lead nitrate decomposes?

• OXYGEN
• NITROGEN DIOXIDE
• BOTH
• NOTA

3. Which gas is released when ammonium dichromate is heated?

• NO2
• NH3
• N2
• H2

4. The general reaction of a decomposition reaction : A B ----->

• BA
• A + B
• AC
• A - B

5. What do you observe when hydrated Copper sulphate is strongly heated?

• Black residue
• Colourless gases are evolved
• Black residue & colourless gases are evolved
• NONE